Challenged claims of Lumenco LLC’s patent that discloses an anti-counterfeiting device configured to write images with light are unpatentable as obvious over prior art, the Patent Trial and Appeal Board said, in an inter partes review by Giesecke+Devrient GmbH, Giesecke+Devrient Currency Technology GmbH, and Papierfabrik Louisenthal GmbH. The board said that the challenged claims are obvious over various combinations of prior art, including prior art that discloses a security element created from a reflective micromirror array, that discloses an optical product that can be configured when illuminated to reproduce by reflected light a 3D image, and that relates to an ...
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